<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>用户登录</title>
</head>
<body>
<form action="">
    用户名: <input type="text" name="username"/><br>
    密码 : <input type="text" name="password"/><br>
    <input type="button" value="登录"/>
</form>
</body>

</html>